Drawing device



Nov. 14, 1933. w, J copp 1,934,969

DRAWING DEVICE Filed Dec. 2, 1929 g Z5 9 9 i 1 i K 6 Zzfy a7? 0 0 22,

UNITED STATES PATENT OFFICE DRAWING DEVICE Wayland J. Copp, Zion, Ill.

Application December 2 5 Claims.

The present invention relates to drawing devices and more in particular to attaching means for guiding drawing instruments.

Among the objects of the present invention is to provide a novel drawing instrument having means associated therewith whereby the instrument may be successively positioned for drawing a series of parallel equally spaced lines.

Heretofore in the drawing of parallel spaced lines, as for example, parallel lines for crosshatching a given area on a drawing for indicating cross sectional views, it has been necessary to depend upon the eye for the proper spacing of these lines. With the eye as the only guide, it is not possible to obtain that degree of accuracy required to present a neat appearing drawing. When a pair of dividers have been resorted to to attain that degree of accuracy and neatness, holes are necessarily punched or pricked into the tracing cloth, which apertures or openings provided means whereby the ink flows through onto the reverse side of the sheet and spreading thereover to form blots. This procedure is time-consuming and unsatisfactory.

It is therefore an object of the present invention to provide a drawing instrument or an attachment for a drawing instrument for eliminating the above difiiculties and which when employed assures the draftsman of a neat appearing drawing, wherein the parallel spaced lines are equally spaced and which insures rapid and neat work.

The invention comprehends the idea of providing a novel attachment which may be readily attached to a drawing instrument and which may be easily adjusted thereon to serve as a guide for determining the position of the instrument for progressively drawing a plurality or series of equally spaced lines.

A further object of the invention is to provide a novel guiding attachment which may be easily and cheaply made, as by stamping or punching the same from sheet metal or the like and which may be readily formed therefrom into the finished article.

In an embodiment illustrative of the invention, the same is shown as comprising a strip of sheet metal having adjacent its central portion laterally extending arms or parts. This strip is bent to provide parallel and spaced end portions which in the drawing is shown as engaging an edge of a triangle. The attachment when so engaged with the triangle, may be adjusted such that the laterally extendingarms or parts are at any desired distance from the 1929. Serial No. 410,943

the device serving to determine the successive position of the triangle or other drawing device to which the same may be attached.

Another object of the invention is to provide a novel guiding attachment which may be easily attached to a drawing instrument and which is provided with a plurality of guiding edges or laterally extending portions or parts whereby the drawing instrument may be successively positioned at variable distances from the preceding drawn line to draw series or sets of equally spaced parallel lines, each set of which may be variably spaced apart.

Other objects, advantages, features and capabilities are comprehended by the invention as will later appear, and are inherently possessed thereby.

Referring to the drawing:

Fig. 1 is a plan view of a strip of sheet metal or the like of a shape suitable for making an embodiment of the present invention.

Fig. 2 is a side view of the strip of sheet metal or the like shown in Fig. 1 of the drawing after the same has been bent at its central portion.

Fig. 3 is a top plan view of the embodiment shown in Fig. 2 of the drawing.

Fig. 4 is a side view similar to that shown in Fig. 2, and showing the attachment with an end thereof bent outwardly.

Fig. 5 is a plan view of the attachment and disclosing the same as attached to a drawing triangle and as actually used for drawing a series of parallel spaced lines.

Fig. 6 is an alternative embodiment of the invention showing an attachment having a plurality of guiding arms and disclosing the same as used for cross-hatching a given area of a drawing.

Fig. '7 is a plan view of another alternative embodiment of the novel attachment and showing the same attached to a drawing triangle.

Fig. 8 is a plan view of a further-alternative embodiment of the present invention showing a drawing triangle with a rule lateral extension for determining the position of the triangle in the drawing of a series of parallel spaced lines.

Referring now more in detail to the drawing, the embodiment selected to illustrate the invention is shown as comprising a strip of sheet metal 1, the same being stamped or punched out Q1 a sheet. of metal or the like. This stamping or strip 1 comprises elongated end parts or portions 2 and 3 of whatever length and width desired, intermediate of which and acfiacent the central portion of the strip are triangularly shaped laterally extending portions or wings 4 and 5. Each of these laterally extending portions is provided with an edge extending at right angles to the longitudinal axis of the strip 1 for the purposes hereinafter to be more fully explained.

This strip or stamping as shown in Fig. 1 of the drawing, is bent or folded along the line 6-6 to form a U-shaped attachment, the ends 2 and 3 thereof being parallel and spaced apart as clearly shown in Fig. 2 of the drawing. The end of the arm or portion 3 of the attachment is bent slightly outwardly and away from. the arm or portion 2, as clearly shown in Fig. 4 of the drawing, and for the purpose to be later more fully explained.

The attachment as shown in Figs. 3 and 4 of the drawing may be readily and removably attached to any drawing instrument, such as a drawing triangle 7, for the guiding-and determining the position of the same in drawing a series or plurality of equally spaced parallel lines, conventionally used to' denote cross sectional views in drawings of machines, structures, or the like.

In Fig. 5 of the drawing, I have pictorially represented the operation of the device when used with a drawing triangle for drawing a series of parallel spaced lines, although the same might be shown attached to a rule, T-square, French curve or any other drawing instrument or device. Heretofore it has been customary to draw a series of parallel lines with the eye as the only guide in an endeavor to obtain the same equally spaced. Dividers may be used or the lines may be ruled by, marking the spaces ofi by a rule, but

in all of these cases considerable time is consumed and the degree of accuracy possible varies with the skill of the draftsman.

With the present attachment, a series of these lines may be easily drawn with a saving of time, and a greater degree of accuracy being attained. As illustrated in Fig. 5, let us assume that 891011 is an area on the drawing sheet which is to be cross hatched, as by parallel lines equally spaced apart. The resilient arms or portions 2 and 3 of the attachment are slipped over the edge 12--13 of the triangle '7, the outwardly bent end of arm 3 facilitating the placing of the attachment thereon. 'The attachment is then adjusted on the triangle such that the edge of the laterally extending arm or portion 4 which is perpendicular to the end portions 2 and 3 of the strip 1 is substantially parallel to the edge 12-13 of triangle '7 and spaced away therefrom a distance equal to that desired between the parallel lines to be drawn. In drawing the parallel lines such as 141-4 and 15-15 etc., the triangle 7 is slid along from left to right on the T-square 16 or any other guiding member desired, the position of the triangle for drawing each succeeding line being determined and guided by placing the perpendicular edge of the arm 4 so as to coincide with the previously drawn line. It will thus be seen that a plurality of equally spaced parallel lines may be drawn with ease and rapidity.

When the triangle 7 is turned such that the edge 12-l3 is inclined upwardly to the left, the part or wing 5 serves as the guiding portion and for spacing or positioning the triangle a given distance away from the preceding line drawn in the drawing of a plurality of equally spaced lines.

In the embodiment shown in Fig. 6 of the draw-. ing the attachment comprises a strip of material 1 having bent end portions similar to those shown in Figs. 1 to 5 of the drawing, the upper end portion 3 having its end bent similarly to the end 3 in the previously disclosed embodiment, while the other arm corresponding to the arm 2 being provided with spaced laterally extending portions or wings 4 4 and 5 5 The attachment is shown as connected to the triangle 7 such that the distance between the wings 4 5 and the edge of the triangle is less than the distance between the wings"? and 4 or 5 and 5 With such a device as shown in this embodiment, the triangle 7 may be successively positioned for drawing a series of sets of parallel lines such as Li -14, 15 -15 and 14 14 15 15 for cross hatchin 10*---11 of a drawing. As the embodiment shown inFigs.1 to 5 inclusive, the wings 5 and 5 may be used when the triangle '7 is turned for drawing a series of successive parallel lines sloping upwardly to the left.

In Fig. 7 of the drawing, an alternative embodiment of the invention is disclosed, the attachment 1'7 in this disclosure, however, having no winged, portions, but provided with a ruled surface, any one mark thereon being used, after the attachment is in place, for determining the successive positions of the triangle 7 from .the preceding drawn line.

Fig. 8 shows another embodiment of the invention in which a drawing triangle 18 is provided with an arm 19 extending laterally to an edge of the triangle and being integral therewith. This arm 19.is provided with a scale upon the upper surface thereof for the uses and purposes hereinbefore described.

In the embodiments of the invention shown in Figs. '7 and 8 of the drawing, it will be readily seen that by using difierent lines upon the ruled part 17 or 19 as guides, any number of equally or unequally spaced parallel lines may be easily and readily drawn.

While I have herein described and upon the drawing shown illustrative embodiments of the invention, it is to be understood that the invention is not limited thereto, but may comprehend otherconstructions, arrangements of parts, details and features without departing from the spirit of the invention.

Having thus disclosed the invention, I claim:

1. A removable attachment for guiding a drawing device, comprising a strip of metal bent adjacent the central portion thereof to provide parallel spaced parts adapted to engage said drawing device, one of said parallel parts having laterally extending portions near the central portion of the strip.

2. A removable attachment for guiding a drawing device, comprising a strip of sheet metal having a bent portion and resilient parallel spaced parts adapted to engage said drawing device, and laterally extending portions on one of said parallel spaced parts near said bent portion and adapted to .be spaced from said instrument and for determining the position of said instrument for drawing a series of parallel spaced lines.

3. A removable attachment for guiding a ruler, triangle, or other drawing device, comprising a strip of metal bent double adjacent the central portion thereof and having integral laterally extending portions near said central portion, said strip being resilient so as to grip said device, and said extending portions having edges adapted to be positioned relative to a previously drawn line whereby the device is in position to draw a line parallel to said previously drawn line and at a given distance therefrom.

4. A removable attachment for guiding a ruler, triangle, or other drawing device, comprising a strip of metal bent double adjacent the central portion thereof and having integral laterally extending portions near said central portion, said strip being resilient so as to grip said device, and said extending portions having edges adapted to be positioned parallel to the adjacent edge of said device whereby, when the edges or said extending portions are placed upon a line, the device is in position to draw a line parallel thereto..

5. A removable attachment for guiding a drawing device, comprising a pair of elongated members arranged in parallel spaced relation and connected together at one end thereof, their free end portions being adapted to engage the drawing device, one of said members having laterally extending portions near its connected end.

WAYLAND J. COPP. 

